For many families, the big question this Christmas isn't what to get mom or dad — it's whether to go real or fake when it comes to Christmas trees. Increasingly, Americans are opting for fake trees, with more than 50 million artificial evergreens expected to light up living rooms this year, compared to some 30 million real trees, according to The New York Times. Many assume reusing a fake tree year after year is the more environmentally conscious holiday choice, but, according to one of the authors of what's been deemed "the most definitive study of the perennial real vs. fake question," natural trees are the greener option. Are they really?

It is not so clear-cut: While the balance tips in favor of natural trees, "there are caveats," says Monica Eng in the Chicago Tribune. Artificial trees are more environmentally friendly "if the consumer drives more than nine miles to purchase a real tree" or holds onto an artificial tree for decades. And, "no matter what kind of tree you get, you can lower your carbon footprint by disposing of it properly" when the times comes to say goodbye."The great tree debate"

There are greener alternatives: It's not just a question of real or fake," says Kim Carlson in the Star Tribune. There are other ways to go — buy a potted tree, rent a living tree, decorate a dead branch, or forget the tree altogether. You can simply "let Mother Nature be your holiday designer" and decorate with pine cones, pomegranates, cedar branches, and the like. "A green Christmas tree"